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Photons for Engineering and Manufacturing

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Scientific Highlights

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Datum
8 May 2021
Setup Ptychographic Topography

X-ray ptychographic topography: A robust nondestructive tool for strain imaging

We present x-ray ptychographic topography, a method for strain imaging, and demonstrate its use on an InSb micropillar after microcompression, where the strained region is visualized with a spatial resolution of 30 nm. 

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25 May 2020
3D printed Matterhorn

A miniaturized selective laser melting device for operando X-ray diffraction studies

We report on the development of a miniaturized device for operando X-ray diffraction during laser 3D printing. Its capabilities are demonstrated by ex situ printing of complex shapes and operando X-ray diffraction experiments using Ti-6Al-4V powder. 

 

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21 May 2020
TEM matrix distortion

Influence of thermo-mechanical history on the ordering kinetics in 18 carat Au alloys

In situ high-energy synchrotron X-ray diffraction experiments in combination with electron microscopy observations reveal the influence of the thermo-mechanical history and chemical composition on the ordering kinetics during isochronal heating of 18 karat Au alloys.

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11 May 2020
Cover Materials Today

Operando X-ray diffraction during laser 3D printing

Ultra-fast operando X-ray diffraction experiments reveal the temporal evolution of low and high temperature phases and the formation of residual stresses during laser 3D printing of a Ti-6Al-4V alloy. The profound influence of the length of the laser-scanning vector  on the evolving microstructure is revealed and elucidated.  

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10 October 2019
HRDIC

Characterisation of work hardening and springback in Ti

Interrupted standard tensile tests with in situ x-ray diffraction and quasi-in situ electron backscatter diffraction reveal the origin behind the work hardening plateau and springback.

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12 April 2019
Helena van Swygenhoven

Prof. Helena Van Swygenhoven presented the plenary Kavli lecture at the MRS spring meeting 2019

Plenary Session Featuring The Fred Kavli Distinguished Lectureship in Materials Science:

Tuesday, April 23
8:15 am – 9:30 am
PCC North, 100 Level, Ballroom 120 D

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11 January 2019

Revealing the role of microstructure architecture on strength and ductility of Ni microwires by in-situ synchrotron X-ray diffraction

The effect of diameter reduction on the mechanical properties of cold-drawn nickel microwires has been analyzed by a combination of in situ X-ray diffraction and electron backscatter diffraction observations.

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26 November 2018

A High Resolution Digital Image Correlation Study under Multiaxial Loading

We have developed a new cruciform geometry with reduced thickness at the center, which allows reaching high plastic strain under equibiaxial loading. The novel thinning method results in excellent surface quality, suitable for electron backscatter diffraction (EBSD) and high-resolution digital image correlation (HRDIC) investigations. We performed an in-situ HRDIC study on a 304 austenitic stainless steel using the new cruciform geometry to follow the slip activity under uniaxial and equibiaxial loadings.

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20 November 2018

In situ tension-tension strain path changes of cold-rolled Mg AZ31B

The mechanical behavior of cold-rolled Mg AZ31B is studied during in-plane multiaxial loading and tension-tension strain path changes using in situ neutron diffraction and electron backscatter diffracion.

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PEM
Paul Scherrer Institut
CH-5232 Villigen-PSI
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Prof. Helena Van Swygenhoven
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+41 56 310 2931
E-mail:
helena.vs@psi.ch

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